Water floating type domestic sewage treatment water recycling equipment

Abstract

The invention discloses water floating type domestic sewage treatment water recycling equipment which is integrated on a floating body platform, and the total occupied area is less than or equal to 3m. The equipment comprises a pretreatment unit, a multi-stage A / O biochemical treatment unit, an intermediate precipitation unit, an MBR membrane deep separation unit, a clear water recycling unit and an intelligent control unit which are sequentially connected in the water flow direction. The biochemical treatment unit forms a high-load bioreactor by adding high-specific-surface-area biological filler; and an immersed ultrafiltration membrane component is arranged in the MBR tank. A trapezoidal rainwater collecting device is arranged at the top of the clear water tank, and intelligent filtering and automatic supplementing of rainwater are achieved through a liquid level sensor and a controller. The system also integrates photovoltaic power supply and mobile phone APP remote control functions, and can efficiently treat domestic sewage and realize cyclic utilization of water resources.

Description

Floating domestic sewage treatment and water recycling equipment Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a floating domestic wastewater treatment and recycling device. Background Technology

[0002] In scenarios such as floating work platforms, aquaculture rafts, and water parks far from land, people generate domestic sewage. Traditional treatment methods involve transporting the sewage by boat or simply discharging it directly. The former is costly and inconvenient to operate, while the latter causes water pollution, neither of which meets the requirements of environmental protection and sustainable development. Furthermore, these scenarios often lack freshwater supply, leading to water scarcity. Existing technologies include some mobile or small-scale sewage treatment equipment, but most are designed for land use, are bulky, have poor resistance to swaying, and low integration, making them unsuitable for space-constrained, swaying floating platforms. At the same time, existing equipment often lacks effective water resource recycling and rainwater utilization mechanisms, failing to fundamentally solve the freshwater shortage problem on floating platforms. Therefore, there is an urgent need for a highly integrated, stable, and adaptable specialized device capable of sewage purification and water resource recycling in floating environments. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a floating domestic sewage treatment and water recycling device. This device features high integration, small footprint, light weight, and strong anti-sway capability. It can effectively treat domestic sewage generated by floating platforms and comprehensively utilize the treated wastewater and collected rainwater to achieve water resource recycling and solve the problem of freshwater shortage in aquatic environments.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this invention is as follows: a floating domestic sewage treatment and water recycling device, including a floating platform, the floating platform including a steel structure platform and a pontoon, the steel structure platform can be fixed on the floating pontoon to adapt to water surface fluctuations; the device is integrated into a unit that can be fixed to the steel structure platform, including a pretreatment unit, a biological treatment unit, an intermediate sedimentation unit, a membrane deep separation unit, a clean water reuse unit and an intelligent control unit connected in sequence along the water flow direction; the pretreatment unit includes a screen for intercepting large particulate matter and an equalization tank for adjusting water quality and quantity connected in sequence, the equalization tank being equipped with an inlet pipe; the biological treatment unit includes an anaerobic tank, an anaerobic sedimentation tank, a pre-aeration tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank and a secondary aerobic tank connected in sequence, the primary and secondary aerobic tanks being filled with biological packing material for enriching microorganisms, forming... The system comprises a high-load bioreactor zone; an intermediate sedimentation unit, a secondary sedimentation tank connected to the outlet of the secondary aerobic tank, used to settle activated sludge and transport the supernatant to subsequent units; a membrane deep separation unit, an MBR tank connected to the supernatant outlet of the secondary sedimentation tank, with an internal submerged ultrafiltration membrane module; a clear water reuse unit including a clear water tank connected to the outlets of the MBR tank and the MBR tank; and an intelligent control unit including a control device, a level sensor, and a water supply valve. A rainwater collection device with a trapezoidal cross-section is installed on the top of the clear water tank, containing a collection trough connected to the clear water tank via a rainwater connection pipe and a water supply valve. The rainwater connection pipe is equipped with a rainwater filter. A level sensor is located inside the clear water tank to detect the level signal and transmit it to the controller. The control device controls the opening and closing of the water supply valve based on the level signal to automatically replenish the collected rainwater into the clear water tank.

[0005] Preferably, the biological filler is a biomass-increasing sponge filler made of polyurethane, with a specific surface area greater than 3000 m² / m³ and a specific gravity close to that of water.

[0006] Preferably, the floating platform is also equipped with a toilet, the toilet's outlet is connected to the inlet pipe, and the upper side wall of the clean water tank is equipped with an outlet pipe, which is connected to the toilet's water storage tank.

[0007] Preferably, the control device includes an intelligent control box, cables, and battery components. The intelligent control box is controlled by a PLC, equipped with a true-color touch screen, and has remote and local control functions via a mobile APP. The battery components include a mounting base and an inverter. The mounting base is connected to the side of the rainwater collection device, and a photovoltaic panel is installed on the mounting base. The inverter is electrically connected to the photovoltaic panel, and the intelligent control box is connected to the inverter via a cable.

[0008] Preferably, an aeration fan is installed on the top of the clear water tank, and the aeration fan is connected to the MBR tank through an aeration pipe.

[0009] Preferably, the clear water tank is equipped with a return water pipe, which is connected to the outlet of the MBR tank. The return water pipe is equipped with a branch pipe, which is equipped with a backwash water pump and an electric valve. The return water pipe is also equipped with a suction water pump.

[0010] Preferably, a biosensor is installed at the bottom of the rainwater collection device.

[0011] The beneficial effects of this invention are as follows: This technical solution successfully solves the problem of on-site treatment and reuse of domestic sewage from floating facilities (such as landscape platforms, yacht marinas, etc.) by integrating a highly integrated and lightweight multi-stage A / O and MBR membrane treatment process onto a floating platform. Its beneficial effects are mainly reflected in the following aspects: First, through the composite process of "anaerobic sedimentation + multi-stage A / O + MBR," efficient removal of COD, nitrogen, and phosphorus from sewage is achieved, and the application of biological packing significantly increases sludge concentration and treatment efficiency, ensuring excellent effluent quality; second, the innovative integration of a rainwater harvesting and intelligent water replenishment system allows for automatic replenishment of the reuse water source using natural rainwater based on the tank level, effectively solving the problem of freshwater shortage on floating platforms; third, the entire system achieves energy self-sufficiency (photovoltaic power supply) and intelligent management (remote control via mobile APP), and is equipped with safety sensing devices, offering significant advantages such as low operating costs, convenient maintenance, and safety and environmental friendliness. Attached Figure Description

[0012] Figure 1 is a structural schematic diagram of a floating domestic sewage treatment and water recycling device according to a specific embodiment of the present invention.

[0013] Labeling Explanation: 1. Floating Platform; 11. Steel Structure Platform; 12. Floating Cylinder; 13. Toilet; 2. Biological Treatment Unit; 21. Anaerobic Tank; 22. Anaerobic Sedimentation Tank; 23. Pre-aeration Tank; 24. Primary Anoxic Tank; 25. Primary Aerobic Tank; 26. Secondary Anoxic Tank; 27. Secondary Aerobic Tank; 3. Intermediate Sedimentation Unit; 4. Membrane Deep Separation Unit; 5. Clear Water Reuse Unit; 51. Clear Water Tank; 511. Rainwater Collection Device; 5111. Rainwater Connection Pipe; 5112. 5113. Water supply valve; 52. Rainwater filter; 53. Water outlet pipe; 54. Aerator; 55. Return water pipe; 541. Branch pipe; 5411. Backwash water pump; 5412. Electric valve; 542. Suction pump; 6. Intelligent control unit; 61. Control device; 611. Intelligent control box; 612. Cable; 613. Battery assembly; 6131. ​​Mounting base; 61311. Photovoltaic panel; 6132. Inverter; 62. Liquid level sensor; 7. Biosensor. Detailed Implementation

[0014] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0015] Please refer to Figure 1. A floating domestic sewage treatment and water recycling device includes a floating platform 1, which includes a steel structure platform 11 and a pontoon 12. The steel structure platform 11 can be fixed on the floating pontoon 12 to adapt to water surface fluctuations. The total area of ​​the device is ≤3m², the total weight is ≤500kg, and it is suitable for waters with a depth greater than 2 meters.

[0016] The equipment is integrated into a steel structure platform 11 and includes a pretreatment unit, a biochemical treatment unit 2, an intermediate sedimentation unit 3, a membrane deep separation unit 4, a clean water reuse unit 5, and an intelligent control unit 6, connected sequentially along the water flow direction. The pretreatment unit includes a screen for intercepting large particles and an equalization tank for regulating water quality and quantity, connected sequentially. An inlet pipe is installed on the equalization tank. The biochemical treatment unit 2 includes an anaerobic tank 21, an anaerobic sedimentation tank 22, a pre-aeration tank 23, a primary anoxic tank 24, a primary aerobic tank 25, a secondary anoxic tank 26, and a secondary aerobic tank 27, connected sequentially. Biological packing materials for enriching microorganisms are added to the primary and secondary aerobic tanks 27 to form a high-load bioreactor zone. The intermediate sedimentation unit 3 is a secondary sedimentation tank connected to the outlet of the secondary aerobic tank, used to settle activated sludge and transport the supernatant to subsequent units. The membrane deep separation unit 6... Unit 4 is an MBR tank connected to the supernatant outlet of the secondary sedimentation tank, and has a built-in submerged ultrafiltration membrane module; the clean water reuse unit 5 includes a clean water tank 51 connected to the outlet of the MBR tank and the outlet of the MBR tank; the intelligent control unit 6 includes a control device 61, a liquid level sensor 62 and a water replenishment valve 5112. The top of the clean water tank 51 is equipped with a rainwater collection device 511. The rainwater collection device 511 has a trapezoidal cross-section and a water collection trough inside. The water collection trough is connected to the clean water tank 51 through a rainwater connecting pipe 5111 and a water replenishment valve 5112. The rainwater connecting pipe 5111 is equipped with a rainwater filter 5113. The liquid level sensor 62 is installed inside the clean water tank 51 to detect the liquid level signal and transmit it to the controller. The control device 61 controls the opening and closing of the water replenishment valve 5112 according to the liquid level signal to automatically replenish the collected rainwater into the clean water tank 51.

[0017] In the above embodiments, it should be noted that the screen and equalization tank are common in the prior art and are not shown in the accompanying drawings. Domestic sewage first enters the artificial screen through a pipe. The screen gap is 2-5mm, which is used to remove large suspended solids and fibrous debris to protect the subsequent water pump and membrane module. The effluent flows by gravity into the equalization tank, which is equipped with a pre-aeration system to equalize the water quality, prevent sedimentation, and also has a certain preliminary degradation and deodorization function. A sewage lift pump is installed in the equalization tank to quantitatively lift the sewage to the subsequent biological treatment unit 2. The anaerobic tank 21, anoxic tank and aerobic tank of biological treatment unit 2 are constructed in a combined manner and are divided by partitions. The effluent from the equalization tank is first sent to the anaerobic tank 21 by the lift pump. Under anaerobic conditions, polyphosphate-accumulating bacteria will accumulate intracellularly. The effluent releases phosphorus and absorbs some easily degradable organic matter. The mixed liquor then enters anaerobic sedimentation tank 22 for initial sludge-water separation. Sludge settles into the sludge hopper, while the supernatant overflows to subsequent units. The anaerobic sedimentation tank 22 effectively removes detached biofilm and inorganic particles, reducing the impact of suspended solids on subsequent biological treatment tanks. The supernatant from anaerobic sedimentation tank 22 flows by gravity into pre-aeration tank 23, where light aeration is performed. Its main function is to remove harmful gases from the wastewater and increase the dissolved oxygen content, buffering the flow into subsequent strictly anoxic / aerobic environments. This prevents excessive dissolved oxygen in the anoxic tank from affecting denitrification efficiency. The effluent after pre-aeration enters primary anoxic tank 24, where it mixes with nitrified liquid returned from the aerobic tank under anoxic conditions. Denitrifying bacteria utilize the carbon source in the influent to reduce nitrates to nitrogen gas, achieving denitrification. The effluent from the primary anoxic tank 24 enters the primary aerobic tank 25, i.e., the first HBBR tank. This tank contains biomass-increasing sponge packing material made of polyurethane with a specific surface area greater than 3000 m² / m³, good hydrophilicity, and a specific gravity close to water. Under aeration conditions, the packing material is in a fluidized state, allowing for the attachment of high concentrations of microorganisms, maintaining the sludge concentration in the tank at 8000-12000 mg / L. Aerobic microorganisms degrade COD / BOD and convert ammonia nitrogen into nitrates. To further improve treatment efficiency, the effluent can sequentially enter the secondary anoxic tank 26 and the secondary aerobic tank 27, i.e., the second HBBR tank, forming a multi-stage A / O treatment process to enhance nitrogen and phosphorus removal efficiency. The aerobic tanks are mixed... The effluent is returned to the primary anoxic tank 24 via a return pump, with a return ratio of 100%-300%. The effluent from the secondary aerobic tank 27 enters the secondary sedimentation tank for sludge-water separation. The secondary sedimentation tank settles the high-concentration activated sludge, most of which is returned to the upstream anaerobic tank 21 or anoxic tank via a sludge return pump to maintain a high sludge concentration in the biological system. The supernatant overflows into the subsequent MBR tank. Due to sedimentation, the concentration of suspended solids entering the MBR tank is significantly reduced, which can significantly extend the cleaning cycle of the MBR membrane. At the same time, when the MBR unit needs offline cleaning or malfunctions, the effluent from the secondary sedimentation tank can serve as an emergency discharge channel to ensure the basic operation of the system. The supernatant from the secondary sedimentation tank flows by gravity into the MBR tank, where submerged PVDF hollow fiber membrane modules with a pore size of 0 are installed.At a thickness of 0.02μm, clean water permeates through the membrane under the suction of the permeate pump, becoming permeate. The remaining trace amounts of activated sludge, suspended solids, and bacteria are completely retained by the membrane, ensuring clear effluent. An aeration device at the bottom of the MBR tank is used to flush the membrane surface and prevent membrane fouling. The MBR permeate enters a clean water disinfection tank, where it is disinfected with sodium hypochlorite before flowing into a recycled water tank. The tank has an outlet for equipment or toilet flushing, and a rainwater collection port at the top to collect natural rainwater from the top of the equipment and platform structures. When the level gauge in the recycled water tank detects that the level is below the set lower limit, the controller automatically opens the water supply valve 5112 to replenish the recycled water tank with filtered rainwater. When the level reaches the upper limit, the valve automatically closes to prevent overflow, effectively solving the problem of freshwater shortage on the floating platform.

[0018] As an optional implementation, the biological packing material is a biomass-increasing sponge packing material made of polyurethane, with a specific surface area greater than 3000 m² / m³ and a specific gravity close to that of water.

[0019] The above are the implementation methods. This type of filler has good water clarity, large specific surface area, good fluidity, low sludge production rate, and long service life.

[0020] As an optional implementation, the floating platform 1 is also equipped with a toilet 13, the outlet of the toilet 13 is connected to the inlet pipe, and the upper side wall of the clean water tank 51 is equipped with an outlet pipe 52, which is connected to the water storage tank of the toilet 13.

[0021] In the above embodiments, when the water in the clean water tank 51 is full, the water in the clean water tank 51 can flow into the water storage tank of the toilet 13, which can be used when working and going to the toilet. After use, the water in the toilet 13 enters the anaerobic tank 21 through the water inlet pipe to continue to circulate, further solving the problem of domestic sewage generated by the floating platform.

[0022] As an optional implementation, the control device 61 includes an intelligent control box 611, a cable 612, and a battery pack 613. The intelligent control box 611 is controlled by a PLC and equipped with a true-color touch screen, which has remote control and local control functions via mobile APP. The battery pack 613 includes a mounting base 6131 and an inverter 6132. The mounting base 6131 is connected to the side of the rainwater collection device 511. A photovoltaic panel 61311 is mounted on the mounting base 6131. ​​The inverter 6132 is electrically connected to the photovoltaic panel 61311. The intelligent control box 611 is connected to the inverter 6132 via a cable.

[0023] In the above embodiments, the photovoltaic panel 61311 provides power to the equipment, thereby sustainably solving the problem of domestic sewage.

[0024] As an optional implementation, an aeration blower 53 is provided on the top of the clear water tank 51, and the aeration blower 53 is connected to the MBR tank through an aeration pipe.

[0025] In the above embodiments, an air source is provided for the MBR tank to facilitate its stable operation.

[0026] As an optional implementation, the clear water tank 51 is provided with a return water pipe 54, which is connected to the outlet of the MBR tank. The return water pipe 54 is provided with a branch pipe 541, and the branch pipe 541 is provided with a backwash water pump 5411 and an electric valve 5412. The return water pipe 54 is also provided with a suction water pump 542.

[0027] In the above embodiments, the suction pump 542 provides power to the MRC tank, and the pump and electric valve 5412 are used to backwash the components in the MBR tank to prevent the membrane flux from decreasing.

[0028] As an optional implementation, a biosensor 7 is provided at the lower part of the rainwater harvesting device 511.

[0029] In the above embodiments, the system can stop the backwashing process when someone enters, preventing high-pressure air-water mixture and chemical agents from causing harm to personnel, while reducing instantaneous noise and improving personnel comfort.

[0030] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A floating domestic sewage treatment and water recycling device, characterized in that, It includes a floating platform, which consists of a steel structure platform and floats. The steel structure platform can be fixed to the floats floating on the water to adapt to water surface fluctuations. The equipment is integrated into a steel structure platform, which includes a pretreatment unit, a biochemical treatment unit, an intermediate sedimentation unit, a membrane deep separation unit, a clean water reuse unit, and an intelligent control unit connected in sequence along the water flow direction. The pretreatment unit includes a screen for intercepting large particulate matter and an equalization tank for adjusting water quality and quantity, connected in sequence. The equalization tank is equipped with an inlet pipe. The biological treatment unit includes an anaerobic tank, an anaerobic sedimentation tank, a pre-aeration tank, a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank, and a secondary aerobic tank, connected in sequence. The primary and secondary aerobic tanks contain biological packing material for enriching microorganisms, forming a high-load bioreactor zone. The intermediate sedimentation unit is a secondary sedimentation tank connected to the effluent outlet of the secondary aerobic tank, used to settle activated sludge and transport the supernatant to subsequent units. The membrane deep separation unit is an MBR tank connected to the supernatant outlet of the secondary sedimentation tank. The system includes a built-in submerged ultrafiltration membrane module; the clean water reuse unit includes a clean water tank connected to the outlet of the MBR tank; the intelligent control unit includes a control device, a liquid level sensor, and a water supply valve. A rainwater collection device is installed on the top of the clean water tank. The rainwater collection device has a trapezoidal cross-section and a water collection trough inside. The water collection trough is connected to the clean water tank through a rainwater connection pipe and a water supply valve. The rainwater connection pipe is equipped with a rainwater filter. The liquid level sensor is installed inside the clean water tank to detect the liquid level signal and transmit it to the controller. The control device controls the opening and closing of the water supply valve according to the liquid level signal to automatically replenish the collected rainwater into the clean water tank.

2. The floating domestic sewage treatment and water recycling equipment according to claim 1, characterized in that, The biological filler is a biomass-increasing sponge filler made of polyurethane with a specific surface area greater than 3000 m² / m³ and a specific gravity close to that of water.

3. The floating domestic sewage treatment and water recycling equipment according to claim 1, characterized in that, The floating platform is also equipped with a toilet, the toilet's outlet is connected to the water inlet pipe, and the upper side wall of the clean water tank is equipped with a water outlet pipe, which is connected to the toilet's water storage tank.

4. The floating domestic sewage treatment and water recycling equipment according to claim 1, characterized in that, The control device includes an intelligent control box, cables, and battery components. The intelligent control box is controlled by a PLC and equipped with a true-color touch screen. It has remote control and local control functions via a mobile APP. The battery components include a mounting base and an inverter. The mounting base is connected to the side of the rainwater collection device. A photovoltaic panel is installed on the mounting base. The inverter is electrically connected to the photovoltaic panel. The intelligent control box is connected to the inverter via a cable.

5. The floating domestic sewage treatment and water recycling equipment according to claim 1, characterized in that, An aeration fan is installed at the top of the clear water tank, and the aeration fan is connected to the MBR tank through an aeration pipe.

6. The floating domestic sewage treatment and recycling equipment according to claim 1, characterized in that, The clear water tank is equipped with a return water pipe, which is connected to the outlet of the MBR tank. The return water pipe is equipped with a branch pipe, which is equipped with a backwash water pump and an electric valve. The return water pipe is also equipped with a suction water pump.

7. The floating domestic sewage treatment and water recycling equipment according to claim 1, characterized in that, A biosensor is installed at the bottom of the rainwater harvesting device.

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